Comparison

Letterboxd vs Undulge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Letterboxd

Connect with fellow film enthusiasts, log your viewing history, and discover new movies. Share reviews, create lists, and follow friends' cinematic journeys. Offers premium features for enhanced stats and customization.

Highlights
  • Log films with date, rating, and tags
  • Browse popular and highly rated films
  • View and comment on reviews and lists
  • Create and edit custom film lists
  • Follow members and view their activity
  • Search for films, content, and people
  • Upgrade for advanced stats and customization
Features
Read full description

Letterboxd for iOS puts the popular social network for film lovers on your iPhone or iPad, so you can log films and catch up on your friends’ activity with ease. Sign in with your existing account (or create one for free) to enjoy our native app interface. These features of the web experience are supported, with more to come: – Sign in (with 1Password support) or create an account – Browse popular, highly rated and most anticipated films (including our official list of the Top 250 Narrative Features) – Log films with date, rating, review and tags – View film info (including cast & crew, popular lists and reviews) and rate, like, watchlist or mark as watched – View (and filter) your activity feed – Read and comment on reviews and lists – Create and edit lists – View member profiles including films, reviews, diary entries, tags, stats and more – Follow members to see their activity in your feed – Filter and sort collections of films based on specific criteria – Search for films, content and people – Edit your profile settings Our app offers account upgrades: – Upgrade to 1 Year of Letterboxd Pro or Patron – Pro tier adds annual and all-time stats pages based on your account activity, advanced activity and streaming service filters (including the option to pick and filter by the streaming services you subscribe to, powered by JustWatch.com), list cloning and removes third-party ads. – Patron tier provides all the benefits of Pro, plus the option to customize film posters, backdrops on your profile and content (if available), additional stats, a listing in the Patrons directory on our website and early access to new features. – Payment is charged to your iTunes Account when you confirm purchase and your subscription automatically renews unless auto-renewal is disabled at least 24 hours prior to the end of the current period. Your iTunes account will be charged for a renewal up to 24 hours before the end of each current period, at the same annual fee. – You can manage your subscription and disable auto-renewals in the App Store app following purchase. – Any unused portion of a free trial period, if offered, will be forfeited if you purchase a subscription to that publication, where applicable Our terms of use are always available at: https://letterboxd.com/legal/terms-of-use/ We welcome your feedback regarding Letterboxd for iOS. Please email us: hello@letterboxd.com

About

Undulge

Features
Read full description

Spent money at a company whose values don't align with yours? Undulge turns that guilt into action. Every coffee, every online order, every quick meal can feel like a compromise. Undulge lets you balance the scales: purchase our Bacon Bits in the app, select the verified charities working on the issues that matter to you, and we'll donate directly to them. How it works: 1. Buy Bacon Bits: small, one-time purchases fund your giving 2. Choose what to offset: browse companies and causes you want to balance 3. Donate to real charities: support vetted organizations with real impact 4. Track your impact: see your donation history and the difference you've made Whether it's offsetting a late-night Amazon order or a drive-through run, Undulge helps you align your spending with your values, one Bacon Bit at a time.

Screenshots

Letterboxd4 screens
Undulge4 screens

Verdict

The call

The clearest difference is in-app purchases: Undulge at none against Letterboxd's 10. Undulge also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.5). Letterboxd's advantage is update cadence (fortnightly vs every 2 months) and chart position (#18 vs unranked). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Letterboxd sells 9 in-app purchases, starting at $18.99 per year. Undulge asks for nothing beyond the download.

UpkeepUpdate frequency

Letterboxd ships an update fortnightly, Undulge every 2 months. The most recent releases landed on November 10, 2026 and November 9, 2026 respectively.

Scorecard5 real differences · 6 level
Letterboxd versus Undulge: the parameters behind the verdict, then further details
ParameterLetterboxdUndulge
PriceFreeFree
Rating4.8 (88K ratings) — better—
Positive reviews59.3% of reviews—
Number of ratings88K — better—
Update frequencyFortnightly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#18 — better—
DevicesiPhone, iPad, Apple TV — betteriPhone, iPod
Requires iOS17.515.1 — better
Further details — not scored
Size142 MB37 MB
Age rating17+12+
DeveloperLetterboxdLate-Stage Philanthropy

Bugs and requests

Letterboxd

Reported bugs

4 issues
  • Inability to save or edit reviews
  • Search and navigation issues
  • Inconsistent behavior when switching between app and website
  • Syncing and data loss problems when switching devices

Requested features

5 requests
  • Add TV show support
  • Improve social features like notifications and commenting
  • Implement offline functionality
  • Add more customization options
  • Introduce a cheaper tier for basic features

Undulge

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Letterboxd

Subscriptions2
  • Letterboxd Pro (1 Year)$18.991 Year
  • Letterboxd Patron (1 Year)$48.991 Year
One-time7
  • Video Store Rental$3.99
  • Video Store Rental$4.99
  • Video Store Rental$5.99
Show 4 more
  • Video Store Rental$6.99
  • Video Store Rental$9.99
  • Video Store Rental$14.99
  • Video Store Rental2 variants$19.99
None

Undulge

No in-app purchases

Questions

Is Letterboxd free?
Letterboxd is free to download, with in-app purchases available.
Is Undulge free?
Undulge is free to download, with no in-app purchases.
Do Letterboxd or Undulge have ads?
Letterboxd shows ads; Undulge does not.
Which is updated more often, Letterboxd or Undulge?
Letterboxd ships an update fortnightly, and Undulge every 2 months. Most recently, Letterboxd was updated on November 10, 2026 and Undulge on November 9, 2026.

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